Home / 642,130.80-963,484.20-221,708.40

Finding the Fourth Proportional to 642,130.80, 963,484.20 and 221,708.40

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Solution

The fourth proportional to 642,130.80, 963,484.20 and 221,708.40 is: 332,662.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,130.80 : 963,484.20 = 221,708.40 : x
  2. Step 2: Convert to fraction form
    642,130.80/963,484.20 = 221,708.40/x
  3. Step 3: Cross multiply
    642,130.80x = 963,484.20 × 221,708.40
  4. Step 4: Simplify right side
    642,130.80x = 213,612,540,407.28
  5. Step 5: Solve for x
    x = 213,612,540,407.28/642,130.80
  6. Step 6: Final answer
    x = 332,662.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.